Estimated reading time: 10 minutes
Table of Contents
- Why Climbing Shoe Sizing Matters
- How Tight Should Climbing Shoes Be?
- How Much Should You Size Down?
- Climbing Shoe Sizing Chart — EU / AU / US
- Symmetric vs Asymmetric Lasts
- How Closure Type Affects Fit
- Do Climbing Shoes Stretch?
- Castiron Grip Sizing Notes
- Sizing Climbing Shoes for Kids
- FAQ
Why Climbing Shoe Sizing Matters
Climbing shoe sizing is one of the most misunderstood aspects of getting into climbing. Unlike running shoes or gym trainers, climbing shoes are not sized for comfort — they're sized for performance. A shoe that's too big will have dead space around the toes, causing your foot to slide inside the shoe when you try to stand on small holds. A shoe that's too small will be painful and cut sessions short.
For Australian and New Zealand climbers — whether you're at a Climbing Australia-affiliated gym in Sydney or Melbourne, bouldering at Castle Hill in New Zealand, or heading outdoors to Arapiles or the Grampians — getting the sizing right is the single most impactful thing you can do to improve your climbing footwork.
How Tight Should Climbing Shoes Be?
| Level | Toe Position | Heel | Overall Feel |
|---|---|---|---|
| Beginner | Flat or very slightly curled | Snug, no slipping | Snug but wearable for 2+ hours |
| Intermediate | Slightly curled — no dead space | Tight, no movement | Uncomfortable after 30–45 min — remove between routes |
| Advanced | Actively curled — performance fit | Very tight, locked in | Painful after 10–15 min — wear only on route |
The golden rule for Australian and New Zealand beginners: If your toes are curling painfully and you can't wear the shoe for more than 5 minutes, it's too small. A beginner shoe should be snug — not a torture device. You'll be wearing it for full sessions at your local gym while you're learning footwork.
How Much Should You Size Down?
| Level | Size Down From Street Shoe (EU) | Notes |
|---|---|---|
| Beginner | 0–0.5 EU | Prioritise comfort — you'll wear these for full sessions |
| Intermediate | 0.5–1 EU | Tighter fit for better precision on small holds |
| Advanced | 1–2 EU | Performance fit — remove between attempts |
Climbing Shoe Sizing Chart — EU / AU / US
| EU Size | AU/UK | US Men's | US Women's | Foot Length (cm) |
|---|---|---|---|---|
| 36 | 3 | 4 | 5.5 | 22.5 |
| 37 | 3.5 | 4.5 | 6 | 23 |
| 38 | 4.5 | 5.5 | 7 | 23.5 |
| 39 | 5 | 6 | 7.5 | 24.5 |
| 40 | 6 | 7 | 8.5 | 25 |
| 41 | 6.5 | 7.5 | 9 | 25.5 |
| 42 | 7.5 | 8.5 | 10 | 26.5 |
| 43 | 8 | 9 | 10.5 | 27 |
| 44 | 9 | 10 | 11.5 | 27.5 |
| 45 | 9.5 | 10.5 | 12 | 28.5 |
| 46 | 10.5 | 11.5 | 13 | 29 |
Symmetric vs Asymmetric Lasts
| Last Type | Shape | Best For | Castiron Grip Model |
|---|---|---|---|
| Symmetric | Straight — big toe centred | Beginners, all-day comfort, wide feet | SWIFT |
| Asymmetric | Curved — big toe pulled inward | Intermediate–advanced, precision edging, crag climbing | N23, PR23 |
How Closure Type Affects Fit
| Closure | Fit Adjustability | Best For Sizing |
|---|---|---|
| Lace-Up | Highest — adjust tension at every eyelet | Wide, narrow, or unusual foot shapes |
| Velcro | Medium — adjust strap tension | Standard foot shapes, gym climbing |
| Slipper | None — stretch only | Requires precise sizing — no adjustment |
Do Climbing Shoes Stretch?
| Upper Material | Stretch Amount | Break-In Period |
|---|---|---|
| Unlined leather | Up to 1 full EU size | 5–10 sessions |
| Lined leather | 0.5 EU | 3–5 sessions |
| Synthetic | Minimal — 0–0.25 EU | 1–2 sessions |
All Castiron Grip shoes use synthetic uppers — they stretch minimally. Size for the fit you want now.
Castiron Grip Sizing Notes — Australia & New Zealand
| Model | Last | Sizing vs Street Shoe | AU Price |
|---|---|---|---|
| SWIFT | Symmetric | True to size | AU$99 |
| N23 | Asymmetric | Size up 0.5 EU | AU$99 |
| PR23 | Asymmetric | Size up 0.5 EU | AU$109 |
| HUG | Symmetric | True to size | AU$89 |
| ONE | Symmetric | True to size | AU$79 |
| Little ALIEN | Symmetric | True to size | AU$69 |
Not sure about your size? Email support@castironlift.com with your street shoe size and foot width — we respond within 12 hours.
Sizing Climbing Shoes for Kids in Australia & New Zealand
| Age Range | EU Size Range | Recommended Shoe |
|---|---|---|
| Ages 2–11 | EU 25–35 | Little ALIEN — AU$69 |
| Ages 3–13 | EU 28–38 | HUG — AU$89 |
| Ages 5–15 | EU 30–40 | ONE — AU$79 |
Still not sure which size to order?
Email us your street shoe size and foot width — we'll recommend the right size for your foot shape. Free international shipping to Australia and New Zealand on orders over AU$150.
Shop All Castiron Grip Shoes →Frequently Asked Questions
Should climbing shoes be tight in Australia?
Yes — climbing shoes should fit tighter than street shoes. For Australian and New Zealand beginners, snug but comfortable with toes flat or very slightly curled. For intermediate climbers, toes slightly curled with no dead space. For advanced climbers, toes actively curled in a performance fit. If you're a beginner and the shoe is painful after 5 minutes, it's too small.
How much should I size down for climbing shoes in Australia?
Beginners: 0–0.5 EU. Intermediate: 0.5–1 EU. Advanced: 1–2 EU. The N23 and PR23 run slightly small — size up 0.5 EU from your street shoe. The SWIFT runs true to size.
Do climbing shoes stretch over time?
Synthetic climbing shoes (like all Castiron Grip models) stretch minimally — 0 to 0.25 EU. Size for the fit you want now, not the fit you expect after break-in.
What size climbing shoe should I get if I'm between sizes in Australia?
For lace-up shoes (like the SWIFT), go with the smaller size — the lace system lets you adjust the fit. For velcro shoes (like the N23 and PR23), go with the larger size if you're a beginner, or the smaller size if you're intermediate or advanced.
What size climbing shoes for kids in Australia and New Zealand?
Size kids' climbing shoes true to foot length — leave 0.5 EU of growing room. For ages 2–11 (EU 25–35), the Little ALIEN (AU$69). For ages 3–13 (EU 28–38), the HUG (AU$89). For ages 5–15 (EU 30–40), the ONE (AU$79).
Does Castiron Grip ship climbing shoes to Australia and New Zealand?
Yes — AU$25 standard (5–8 business days), AU$45 expedited (2–4 business days). Free on orders over AU$150.
External Resources
- Climbing Australia — Official Federation
- Climbing New Zealand — Official Federation
- theCrag — Australia & NZ Climbing Guide
- 99Boulders — Climbing Shoe Sizing Guide
- Climbing Magazine — Best Climbing Shoes Guide
📚 More from the Castiron Grip Climbing Reviews Hub:
How to Choose Climbing Shoes 2026 — Australia & New Zealand →
Written by T-K